sterile

this term is used for both women and men. "Infertile" refers to the lack of offspring in people who have been having unprotected intercourse for a certain length of time. "Sterile" usually indicates that a cause for the infertility has been found. Infertile people are not necessarily sterile. Sterile people are always infertile. Infertility is often treatable; sterility generally is not (unless, for example, a tubal ligation or vasectomy can be reversed). See also barren, frigid, impotent, infertile.